Rock-drill.



No. 768,894. PATENTED AUG. 30, 1904. H. DEITZ.

ROCK DRILL.

APPLIOATION FILED SEPT. 22, 1902. RENEWED JAN. 30. 1904.

N0 MODEL. 3 SHEETS-SHEET l PATENTED AUG. 30, 1904.

H. DEITZ.

ROCK DRILL. APPLIOATION FILED SEPT. 22, 1902. RENEWED JAN. 30, 1904.

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N0 MODEL.

5 Q a N Q PATENTED AUG. 30', 1904.

' H. DEITZ.

ROCK DRILL. APPLICATION FILED SEPT. 22. 1902. nnxnwnn JAN. 30, 1904.

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N0 MODEL.

IN VEN TOR. 1% r file/72 UNITED STATES Patented August 30, 1904-.

PATENT OFFICE.

HENRY DEITZ, OF DENVER, COLORADO, ASSIGNOR TO LEWIS DEITZ, OF ALBANY, NEW YORK.

ROCK-DRILL.

SPECIFICATION forming part of Letters Patent No. 768,894, dated August 30, 1904.

Application filed September 22, 1902. Renewed January 30, 1904. Serial No. 191,392.

To all whom, it may concern.-

Be it known that I, HENRY DEITZ, a citizen of the United States of America, residing at Denver, in the county of Arapahoe and State of Colorado, have invented certain new and useful Improvements in Rock-Drills; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in rock-drills; and it consists of the features, arrangements, and combinations hereinafter de: scribed and claimed, all of which will be fully understood by reference to the accompanying drawings, in which is illustrated an embodiment thereof.

In the drawings, Figure 1 is a side elevation of my improved drill. Fig. 2 is a top or plan view of the same. Fig. 3 is a vertical longitudinal section of the drill, taken on the line 3 3, Fig. 1. Fig. 4 is a section taken on the line 1 4, Fig. 3. Fig. 5 is a section taken through the rotating mechanism on the line 5 5, Fig. 3. Fig. 6 is a fragmentary top View of the guide-shell, showing the connection therewith of the cross-bar, in which the feed screw is journaled, the said bar being shown in horizontal section. Fig. 7 illustrates another form of construction for holding the collar extensions free from the drill-holder.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate the guide-shell, and 6 the casing, slidable thereon in the usual manner. In the casing extremities are mounted bearing-sleeves 7 and 8 for the reciprocating drill-holder 9. These bearing-sleeves are held in place by caps 10 and 12. The cap 10 is connected with the casing by bolts 13. Between this cap and a collar 7 on the sleeve 7 is located a cushion 14:, preferably composed of rubber. The collar 7 is located between the cushion and a shoulder 5, formed on the casing. The rear portion of the casing, or

that farther to the left in Fig. 3, is provided arms.

(No model.)

with two oil-cups 15, through which lubricating material may be passed to the inner surface of the bearing-sleeve, which is provided extremity of the rifle-bar is provided with a ratchet-disk 19, located in the chamber in the cap 10, within which is located a number of dogs 20, which are held in operative engagement with the teeth of the ratchet by springs 21. (See Fig. 5.)

The drill-holder is surrounded by four loose collars 22, 23, 24, and 25, each of which is provided with a reduced extension. The collars 22 and 23 are located in the rear of a reciprocating yoke 26, whose lower portion is bifurcated, as shown' at 26, to straddle the drill-holder. The arms 26, which straddle the drill-holder, engage the two collars 22 and 2 1, the collar 22 being located in the rear of said arms and the collar 24: forward of the These collars 22 and 2 1 are provided with angular V-shaped ribs, (designated 22 and 2 1, respectively,) which engage counterpart grooves formed in the adjacent part of the yoke, whereby the collars are supported in position to prevent friction between the engages a shoulder 9 on the drill-holder. The collar is provided with a V-shaped rib engaging a counterpart groove formed in the adjacent face of the shoulder 9.

The upper part of the reciprocating yoke 26 is provided with a vertical slot 26, in which is movably mounted a block 29. The crank 30 of a shaft 31 is journaled in this block and imparts the reciprocating movement to the yoke, which is provided with guide-stems 26, located on opposite sides thereof. One of these stems extends forwardly and the other rearwardly from the body of the yoke. As shown in the drawings, the stems 26 are hollow or provided with longitudinal openings 26"'. These stems engage bearings 32, formed W partly in the body of the casing and partly in the cap 33, which is secured to the casing by bolts 34 and forms a housing for the yoke. The chambers formed by the bearing parts 22 for the yoke guide-stems are closed at their extremities by screw-plugs 33, whose outer extremities are shaped to receivea wrench, as shown at 33. The bearing parts are interiorly threaded to receive the screw-plugs. These bearing parts are also provided with bushings 35. Above these bushings are formed openings into which are screwed oilcups 36. The bushings are provided with ducts 37, leading from the oil-cups to the guide-stems of the yoke. The openings 26 of the yoke guide-stems extend from the extremities of these stems to the slot 26 of the yoke, whereby the lubricating material is allowed to circulate freely between the chambers of the guide-stem bearings and the yokeslot. A circular groove 35 is formed in each bushing 35. These grooves communicate with the ducts 37 and facilitate distribution of the oil supplied to the oil-cups 36.

Between the cap 12 and the shoulder formed on the forward extremity of the sleeve 8 is a shoulder 4, which relieves the jar incident to the engagement of the collar 9 on the drillholder with the shoulder 8 of the sleeve when the drill-holder has reached its forward limit of movement. The forward part of the cas: ing is provided with a threaded opening into which is screwed an oil-cup 3. Communicating with the oil-cup opening is a circular recess 8, formed in the collar 8 and from which lead ducts 8, through which the lubricating material introduced by way of the oil-cup passes to the drill-holder.

Openings 32", communicating with the chambers 32, in which the stems of the yoke move, are formed in the casing to allow the lubricating material to pass from the said chambers to the chamber of the drill-holder.

The lower part of the casing 5 is provided with a depending projection 40, which is bored to receive an interiorly-threaded sleeve 41, engaged by the feed-screw 42. The projection 40 is counterbored from opposite ends to form chambers 43 for coil-springs 44. One of these springs bears at one extremity against a shoulder 41, formed on one end of the sleeve 41, while the other spring bears at one extremity against a nut 45, screwed upon the extremity of the sleeve 41 remote from the shoulder 41. The inner extremities of both springs 44 bear against the central shoulder of the projection 40, located between the two spring-chambers. This construction allows the drill-casing a limited sliding movement in either direction against the springs 44, which form independent or additional cushions or buffers to prevent injury to the parts of the mechanism by jar or concussion incident to the operation of the machine, and particularly the reciprocating movement of the drillholder. The nut 45 is provided with a heady 45, adapted to receive a wrench. The feedscrew 42 is journaled in a cross-bar 46,as shown at 47, the said bar being located at the rear extremity of the machine and connected with the rear extremity of the guide-shell 6 by rods 49. (See Fig. 6.) The feed-screw is provided with a hand-crank 48.

In Fig. 7 is illustrated. another form of construction for the collars 22, 23, 24, and 25. This collar is designated 25 and is cut out, as shown at 25, to allow the shoulder 9 of the drill-holder to enter, whereby the extensioncollar is supported from contact with the drillholder.

The manner of mounting the drill in operative position on a column is not illustrated, as nothing is claimed thereon. The construction, as shown in Fig. 4, is especially designed for operation by an electric motor and a fiexible shaft, (not shown,) the latter to be connected with a spindle 46, journaled in a housing 47 and provided with a gear 48, at one extremity meshing with a gear 49, fast on a crank-shaft 41, which is journaled in the easing, as best shown in Fig. 4. This crankshaftis provided with a balance-wheel 50. It is evident that the crank-shaft may be rotated by any suitable power.

From the foregoing description the operation of the drill will be readily understood. As the crank-shaft is rotated a reciprocating movement is imparted to the yoke 26 through the instrumentality of the crank 30 of said shaft, during which operation the bearing block 29 has a. vertical reciprocating movement in a slot 26 of the yoke. This reciprocating movement of the yoke imparts a corresponding movement to the drill-holder by virtue of the engagement of the depending yokearms 26 with the collars 22 and 24. The yoke supports these collars from contact with the drill-holder, this obviating the friction which otherwise would result from the engagement of the drill-holder with the collars during the rotary action of the holder and its reciprocating movement therein. It is evident that the drill-holder has a limited sliding movement in the collars, which are enstop-sleeve, thus relieving the mechanism from jar or concussion. The cushion 1 L also prevents the jar incident to the engagement of the collar 23 with the stop extremity of the said sleeve. This jar is further relieved by virtue of the movement of the depending part 40 of the casing on the sleeve 41 and against one of the springs 44:, as heretofore explained.

During the forward movement of the drill the collar 25 engages the rear extremity of the sleeve 8, which forms a stop against further forward movement of the collar. The

drill-holder may, however, continue its for" ward movement until the shoulder 9 of the drill-holder strikes the shoulder 8 of the sleeve 8. During the forward movement of the drillholder the machine is relieved from the injurious effects incident to undue jar or concussion by the spring 28, the cushion 4, and one of the springs 44:, as heretofore explained.

The drill-casing is moved forward and back on the guide-shell by the feed-screw 42, which is journaled in the bar 46 and threaded in the sleeve 41, as heretotofore explained. The crank-shaft bearings (see Figs. 1,2, and 4) are provided with threaded openings, into which are screwed oil-cups 36 to facilitate the introduction of lubricating material to the journals of said shaft. These bearings are provided with bushings 36, having oil-openings 36 registering with the oil-cups 36.

Having thus described my invention, what I claim is 1. In a drill, the combination of a casing having a central guideway and a longitudinal guideway located laterally of said central guideway, a drill-holder mounted to reciprocate in said central guideway, a tool-actuating part located laterally with relation to the drillholder and bifurcated to straddle the latter, a

' projection extending from the toolactuating yoke and fitting in the lateral longitudinal guideway to be limited thereby to movement in a path parallel to that of the drill-holder, suitable bearings mounted on the drill-holder on opposite sides of the bifurcated yoke portion, and suitable means for reciprocating the yoke.

2. The combination of a casing having a central guideway and a longitudinal guideway located laterally of said central guideway and communicating therewith, a drill holder way, a tool-actuating part located laterally with relation to the drill-holder, a projection extending from the tool-actuating part and fitting in the lateral longitudinal guideway to be limited thereby to movement in a path parallel to that of the drill-holder, the tool-actuating part being bifurcated to straddle the drill-holder and having a slot formed beyond its bifurcated portion, a bearing-block movably mounted in said slot, an operating crankshaft whose crank engages said bearing-block, the yoke having guide-stems located on opposite sides of its slotted portion and engaging bearings formed in the casing. v

3. In a rock-drill, the combination of a casing having a central guideway, and a longitudinal guideway located laterally of said central guideway and communicating therewith, a drill-holder mounted to reciprocate in said central guideway, a tool-actuating yoke located laterally with relation to the drill-holder and having a projection fitting in the lateral longitudinal guideway whereby it is limited to movement in a path parallel to that of the drill-holder, a suitable operative connection between the yoke and the drillholder,the yoke being provided with a slot formed beyond the drill-holder, and a crank-shaft whose crank passes through said slot.

4. In arock-drill, the combination with a casing, of a drill-holder mounted to reciprocate therein, a yoke also mounted to reciprocate in the casing, asuitable operative connection between the yoke and the drill-holder, the yoke being provided with a slot formed above the drill-holder to receive the crank of an operating-shaft, the yoke having guidestems located on opposite sides of its slot, the

casing having chambers for the yoke-stems which are provided with longitudinal openings extending from their outer extremities to the slot to permit the lubricating material to circulate.

5. In a rock-drill, the combination ofacasinghaving a central guideway, and a longitudinal guideway located laterally of said central guideway and communicating therewith, a drill-holder mounted to reciprocate in the central guideway, a yoke located laterally with relation to the drill-holder and provided with a projection fitting the lateral longitudinal guideway and limited thereby to movement in a path parallel with the drill-holder, the said yoke having arms straddling the drillholder, spring-held collars mounted on the opposite sides of the yoke-arms, forming a yielding connection between the yoke and the drill-holder, and means for reciprocating the yoke.

6. In a rock-drill, the combination of a cas ing having a central guideway and a longitudinal guideway located laterally of said central guideway and communicating therewith, a drill-holder mounted to reciprocate in the mounted to reciprocate in said central guidecentral guideway, a yoke located laterally with relation to the drill-holder and provided with a projection fitting the lateral longitudinal guideway and limited thereby to movement in a path parallel with the drill-holder, collars loosely mounted on the drill-holder on opposite sides of the yoke, springs surrounding the drill-holder engagingsaid collars, the yoke having a part passing between the collars whereby as the yoke is reciprocated, a

corresponding movement is imparted to the drill-holder, and suitable means for reciproeating the yoke.

7. The combination with a casing, of a drillholder mounted to reciprocate therein, a yoke also mounted to reciprocate in the casing and bifurcated to straddle the drill-holder, springheld collars mounted on the drill-holder on opposite sides of the yoke, and a connection between the yoke and the collars whereby the latter are supported from contact with the drill-holder, substantially as described.

8. The combination of a casing provided with a central guideway and a longitudinal guideway located laterally of said central guideway and communicating therewith, a drill-holder mounted to reciprocate in the central guideway, a tool-actuating yoke located laterally with relation to the drill-holder and provided with a projection fitting the lateral longitudinal guideway, whereby it is limited to movement in a path parallel to that of the drill-holder, the yoke being arranged to straddle the drill-holder and provided with a slot, an operating crank-shaft whose crank passes through said slot, and yielding collars mounted on the drill-holder on opposite sides of the yoke.

9. In a rock-drill, the combination with a casing, of a drill-holder mounted to reciprocate therein, a yoke also mounted to reciprocate in the casing and provided with arms arranged to straddle the drill-holder, the yoke being slotted above the drill-holder to receive the crank of an operating-shaft, and provided with front and rear stems extending parallel with the drillholder, two collars loose on the drillholder on each side of the yoke, coil-springs separating the two pairs of collars, the foremost collar of one pair and the rearmost collar of the other pair engaging the yoke-arms, while the other collars engage shoulders on the drill-holder, and a suitable connection between the yoke and its engaging collars whereby the latter are supported from contact with the drill-holder.

10. In a rock-drill the combination with a casing, of a drill-holder mounted to reciprocate therein, a yoke also mounted to reciprocate in the casing and provided with arms arranged to straddle the drill-holder, the yoke being slotted above the drill-holder to receive the crank of an operating-shaft,and provided with front and rear stems extending parallel with the drill-holder, two collars loose on the drillholder on each side of the yoke, coil-springs surrounding the drill-holder and separating the two pairs of collars, the front collar of one pair and the rear collar of the other pair, en

gaging the yoke-arms, while the other collars engage shoulders of the drill-holder, and a suitable connection between the last-named collars and the shoulders of the drill-holder, whereby the interior surface of the said col lars is normally free from contact with the drill-holder.

11. In a rock-drill, the combination with a casing, of a drill-holder mounted to reciprocate therein, a yoke also mounted to reciprocate in the casing and provided with arms arranged to straddle the drill-holder, the yoke being slotted above the drill-holder to receive the crank of an operating-sh aft, and provided with front and rear stems extending parallel with the drill-holder, a pair of collars loose on the drill-holder on each side of the yoke, a coilspring separating the individual collars of each pair, the foremost collar of one pair and the rearmost collar of the other pair engaging the yoke-arms, While the other collars engage shoulders on the drill-holder, the drill-casing being provided with stops located in the front and rear for limiting the movement of the foremost and rearmost collars.

12. In a rock-drill, the combination with a casing, of a drill-holder mounted to reciprocate therein, a yoke also mounted to reciprocate in the casing and bifurcated to straddle the drillholder, the yoke having front and rear guidestems engaging chambers formed in the easing, and being provided with a slot located intermediate the guide-stems, and adapted to receive the crank of an operatingshaft, two pairs of collars surrounding the drill-holder, one pair being located on each side of the yoke, each collar having a reduced extension, the rearmost collar on one side of the yoke and the foremost collar on the opposite side of the yoke, engaging the latter, coil-springs surrounding the drill-holder, interposed between the two pairs of collars and surrounding the collar extensions, one collar of each pair engaging a shoulder on the drill-holder, and a suitable connection between the collars and their engaging parts whereby their interior surfaces are normally held free from the drillholder.

13. In a rock-drill, the combination with a guide-shell and a casing slidable thereon, of a drill-holder mounted to reciprocate in the easing, the latter being provided with means for limiting the movement of the drill-holder in both directions, the casing being provided with a projection having an opening, a sleeve inserted in said opening and interiorly threaded, a feed-screw journaled in a part connected with the guide-shell, and engaging the threads of the said sleeve, springs surrounding the sleeve on opposite sides of the casing projection through which the sleeve passes, the sleeve having shoulders engaged by the springs,

whereby the projection of the casing has a sliding movement on the sleeve against the springs, substantially as described.

14. The combination with a guide-shell, a casing, a reciprocating drill-holder mounted in the casing, and a feed-screw connected with the guide-shell, of a sleeve within which the feed-screw is threaded, the casing having a projection through which the said sleeve passes, whereby the casing is slidable on the sleeve, and springs surrounding the sleeve and forming buffers or cushions against which the projection of the casing bears, substantially as described.

15. The combination with a guide-shell, a drill-casing and feed-screw, of a nut in which the feed-screw is threaded, the said nut having a slidable connection with the casing, springs surrounding the nut on opposite sides of the casing connection, and stops on the nut to prevent longitudinal movement of the springs.

16. The combination with a drill-casing, of a feed-screw nut slidably mounted thereon, and buffer-springs forming a yielding connection between the casing and nut on opposite sides of the casing part through which the nut passes.

17. The combination with a drill-casing having a projection provided with an opening and counterbored to form spring chambers, a sleeve-nut passed through the opening of the projection and slidable therein, and springs surrounding the nut and located in said chambers, the nut having shoulders whereby the springs are confined in the chambers, substantially as described.

18. The combination with a drill-casing, of a feed-screw nut with which the casing is slidably connected, and a resilient device mounted on the nut on opposite sides of the casing connection, the said devices forming buffers for the drill-casing in both directions.

19. In a rock-drill, the combination with a casing, of a drill-holder mounted to reciprocate therein, an exterior sleeve screwed upon the rear extremity of the drill-holder which is hollow to receive a rifle-bar for rotating purposes, and a nut screwed into the hollow portion of the drill-holder and having a head engaging the rear end of the sleeve to lock the latter against unscrewing for the purpose set forth.

20. In a rock-drilling machine, the combina tion of a casing and guide-shell, of a drillholder mounted to reciprocate in the casing, a yoke arranged to reciprocate in the casing and bifurcated to straddle the drill-holder, its central portion being slotted, a journal-box slidable in the slot of the yoke, a crank-shaft engaging said box and journaled in the easing, two collars loosely mounted on the drillholder on each side of the yoke, each collar of each pair having reduced extensions, a coilspring located between the collars of each pair, and the drill-holder having stops to engage the foremost and rearmost collars respectively of each pair, substantially as described.

21. In a machine of the class described, the combination with a guide-shell and a casing slidable thereon, of a drill-holder mounted to reciprocate in the casing, means for operating the drill-holder, a collar mounted on the drillholcler on each side of the operating means, a coil-spring surrounding the drill-holder in front of one collar and in the rear of the other collar, loose collars surrounding the drillholder and respectively engaging the forward extremity of one spring and the rear extremity of the other spring, stops on the drill-holder which the front and rear collars respectively engage, and stops on the casing to limit the forward movement of the foremost collar and the rearward movement of the rearmost collar, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY DEITZ.

Witnesses:

DENA NELsoN, A. J. OBRIEN. 

